Start to look for outside scholarships based on your ethnicity/country of origin, there are some like that.
There are a number of much lower ranked US schools that tend to give internationals merit and are very anxious to get some international students to fill up their freshman seats. Illinois Tech in Chicago, College of Wooster in Ohio are two that I can think of. It may not be enough for your financial need, but I have seen Illinois Tech offer addition merit for a housing allowance to try to get an international student to matriculate.
Neither may be good for neuroscience.
I might look at U of Arizona and Arizona State, and U of Alabama, maybe.
I see international students heading to Florida as well, going the community college route. I tend to agree with many posters here that you may be setting yourself up for no financial match school, with your list and also quite a few rejects.
If you are a girl, Wellesley College does offer internationals the same financial aid as US and permanent residents and a few others make the “internationals are the same aid as American citizens/permanent residents” list.
What country you are from matters less than counselors in many International IB schools may be telling you.
There is no bleeding heart in the USA when it comes to international admissions, and many schools limit internationals, such as MIT its strictly 9% of freshman seats are awarded to international students. DACA recipients in the USA count as international by the way for MIT.
USC and UIUC offer a lot of seats to full pay internationals.
Also to get to the USA you will have to prove that you
have a pot of money large enough for all 4 years of your education. That may be another stumbling block.
No one wants to discourage you, but its a topic where many students come in feeling enthusiastic and end up disappointed and angry.
Look at TU Delft in The Netherlands, Glasgow U in Scotland, although I don’t know about neuroscience, they offer pretty good deals to some international students.